You are a Jewish person inside Nazi occupied France. You are hiding under the floorboards with many others Jewish people, when evil Nazis come in to search houses near by. As you are there, a baby with the jewish hiders starts to cry.
This baby cannot stop crying, and you know if it continues to cry, you, and everyone under the floor, could possibly be discovered by the nazis and killed. You don't have time to find out if they're going to skip your house or not, and even then, there is still the possibility of them hearing it.
Do you kill the baby?
No "muffling his cries, getting it drunk, etc"
You either kill it, or you don't and risk the possibility of getting everyone else killed.